Carburetor



3 Sheets- Sheet 1 Jan. 6, 1948. o. oswALD CARBURETOR Origifial FiledSept. .28, 1959 N ME llrllllllrfllllvrlllllll 11/141;

Re. 22,962 Y 0., OSWALD Jan. 6, 1948.

CARBURETOR Original Filed Sept.-28,: 1939 5 Shets-Sheet 2 :5 Sheefs-Shet:5

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O. OSWALD CARBURETOR Original Filed Sept. 28, 1939 Fly. 10

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El... l--- :ziiV m Reissued Jan. 6, 1948 CARBURETOR Olaf Oswald,Honolulu, Territory of Hawaii Original No. 2,393,118, dated January 15,1946,

Serial No. 296,967, September 28, 1939. Application for reissue February11, 1946, Serial No.

32 Claims. (Cl. 123-119) This invention relates to carburetors, mypurpose being to provide a device of this character which willaccomplish automatically and according to engine speed the followingobjects:

AControl of fuel mixture.

BImproved volatilization of fuel. C-Increased weight of air-fuel charge.D-Cooling of'engine, and braking effect. E-Sudden acceleration.

FFuel economy.

M carburetor embodies many novel features of construction andcombinations and arrangements of parts, all of which will be more fullyhereinafter described and pointed out in the claims.

In the accompanying drawings- Fig. l is a view in longitudinal sectionthrough my improved carburetor, on the line A-A of Fig. 6.

Fig. 2 is a left end view (Fig. 1) of air cylinder 2 (reduced size)showing air ports 43 of air piston 4. 1

Fig. 3 is a view in horizontal section through my accelerator assemblywhich is indicated generally by the numeral 35.

Fig. 4 is a view in horizontal section through piston seat 70,illustrating air ports N.

Fig. 5 is a view in partial transverse section on the line G--G of Fig.6, viewed as facing fuel bowl 16.

Fig. 6 is a view in horizontal section on the irregular section-line C-Cof Fig. 1, emphasizing governor assembly l3, ports 67 of the mixingValve piston I5, plug 33, idler assembly 34, accelerator assembly 35,and fuel inlet 32.

Fig. 7 is a plan view of the body 3!), illustrating my improved slidebar, jet casing, slide bar guidecover, primary air ports, blind ports(shown by dotted lines), and fuel bowl.

Fig. 8 is an enlarged plan view of my improved slide bar casing.

Fig. 8-A is a View in transverse section on the line 0-0 of Fig. 8.

Fig. 9 is an enlarged plan view of assembly of slide bar, jet casing,and slide bar guide-cover, showing the relative positions of slide bardischarge openings and jets in casing, the latter being the dottedcircles.

Fig. 9A is a view in transverse section on the line B-B of Fig.9, withfuel jets omitted.

Fig. 10 is an enlarged fragmentary plan view of my improved slide bar,showing discharge openings 48. 7

Fig. 10A is a view in transverse section on the line D-D of Fig. 10.

Fig. 11 is a side view and a longitudinal section (enlarged) of spring54 of slide bar guidecover 9, this spring being shown in Workingposition on Fig. 9A.

Throughout the drawings the numeral 2 designates my horizontal aircylinder, this cylinder having bolted to its intake end the choke tube Icontaining valve 40, and is bolted at its discharge end to the verticalflanges of central body 30 and mixing chamber housing 20. Cylinder 2contains air piston 4 adapted to slide therein, piston recoil spring 3,piston coil compression spring 5. Air piston 4 is provided with endports 43 opening into the central annular space 42 which communicateswith central bore 45 through side ports 44. These end and side ports andthe central bore are of area suificient to pass therethrough the maximumquantity of air required by the engine. Fitted into the open end ofcentral bore 45 is wristpin 46 into which is inserted the threaded endof adjustable (longitudinally) universal joint 6, this member 6 beingoperatively connected to the end of slide bar 1'. Piston 4 is preferablyfitted with the rings 41, but may instead be provided with severalshallow compression grooves. A coil spring 5 in cylinder 2 exertspressure on the piston 4 to hold it in idling position against therecoil spring 3.

Central body 30 and its fuel bowl cover 13 are cast or otherwise made toconform with the arrangement of chambers and other parts as follows: Afuel bowl 16 is provided in the body 39 and is equipped with a float 3|hinged to the cover 73 and having a valve which controls a fuel inlet 32supplying fuel to the bowl so that the float operates to maintain thedesired level of fuel in the bowl. The fuel outlet from the bowlconsists of a main fuel duct 11 which is substantially horizontal andlocated below the liquid level in the bowl. This main fuel duct isnarrowed to a slit at its intake end, and communicates with a pluralityof parallel vertical jet feeder ducts 18 which are preferably out oftransverse alinement with each other and in direct verticaljuxtaposition with the jets 50 in the casing 8.

This jet casing 8 is centered on the longitudinal axis of the body 30and countersunk flush with its upper surface, having guides parallelwith said axis, the guide 49 being formed of the main body of thecasing. The guides 52 are separately formed although with the same innerangle of slope as guide 49, the slots for the screws holding able,having countersunk heads on ,under side of 5 casing B. :Ihesejetscommunicate with upper or sliding-surface of sca'sing 8 preferably byr'neans of shallow'holes of diameter equal to the maximum dischargediameter of the jets selected. These I preferably employ, forthe"purposeef neritrolling the outlets of jets; 50,-;my-improved slidebar 'I which is provided wit spears-"e538 outlet transverse alinementwithpae eather. The;-relationship of openings 48 to jets 50 ispreferably as illustrated in Fig. 9, the central opening A8 being invertical juxtaposition with one cen'traYjet-EO and the two outer jetsfbeing indicatedby dotted cir'cles.

Slide bar I is guided gerierally--"by-- the fixed upward thrust by itsinwardly o3 cting portion surface trans bar 1- sritigly -a'gainst jetdis charge surf-ace of casing 8 and to automatically compensate for'-anywearof -the*s-li-ding surf-aces ofA 5 slide bar T and its Poa'si-ng8. Guides' 52 --are adjusted -to an esisy 'i'itagainst bar I-,--tl-iepurpose beingto insiir-that the bar-Fsl ialhnot get-out-of controloralinernent in the event- 01 a meehanical failure-of the' 'springfl5 4.

"The centralibody afl has formed: in items-meal I5 opening upwardfronrprirnar spot chamber8li beingasa d H and at exhaustpoitllllforjconventional pipe or tubing connections respectivlyfwith asource of heat'anda'rne'ansbfdischarge. Projecting downward-from roofoffhot sp t" hambr are 'riffl'es 'as illustrated in "Fig; 5:;Proeetingfi1pward from floor cream g V ryfair m ni-war eorrespsndmgrifiles. Als'o"formed inttheibddy u -are blind ports 82,- *open*to'thefat'rriosphere'pn theifi'r' rder side preferably,"-their--functionbeing to insulate employed to" nesignate fthe mixing "chamber ousing,"thef lower 'ing5'l. b e ing fibmvertical ji'flang off housin 20 is,auxiliary f airf entry port (59. Pressed 1 into ports 1 I Fit'ted intofthe -lower. portion er this such as aset se'rew. venture 2 r"- and part1.5 are so formed and adapted that the low pressuieare'a is at "slidebar jet outlets. ,iAppro 'n'iate'ly"cenassure.

dto'fniovein mixi ngcnambeii ls; itsupperj'en 'b' rigl connected=m-thesentnruga1 gcvemor assembi -is by means '75 ition against nne t qs:withsth a semb ralh a d. a m-p st n is r b edto imi tionyamthisvmovethefulbowl Hi1 against over hea't ir'ig.

removable fl-lower fportionoflwhich is contoured tosffit piston "seat 10and the"upperportionof'which communicates through side ports 56 withcentral annular jets are arranged in rows parallel to the longitudi- 1 0c nal axis of easing 8 and preferably out oi -trans verse alinement witheach other.

space 65 whence open into mixing chamber 16 or'passages are ofproportions and aggregate area adaptd ta*pass 'therethrough the maximumfuel mi tuige requ ments of the engine. Piston I5 is d'd"with rings 68,but may have B ab y P allow grooves on each sliding "siii'fae'el Thereference numeral 13 is employed to des- "i'gnate my governor assemblywhich is operatively fastened at its upper end to motor shaft 56 bymeans: ofl sleeve 2152* into-the open --'end of= iwhich:rsleevetelescopes thes'haft 6 l againstzthetension ofvspringz fillre Foethiskspi ing fiu rna'y be substitute'd a like-element of diameterapproximately equal to the periphery ofchamber, L5 and extendingverticallybetwenith 'top OffjPis'ton 1.15 and inner projection "f'lower'nsnigts'l.

The reference numeral designates .theiiblower oriinpellerj'which is perja ively fastend to motor shaft 56, this shaft'jp'a g" t iigh.upperhousing II, and housing'll being"adapted for e intakemanifoldconnections at :This ;imvpeller. is adaptedeffect to the 'endv o c,empac ting the fuel charge in u m t:thesen i ei;suct on theengine cylinders.H

Reference numeral In designates thexmiotor, which isbasedrpnmpfofehousing; l;.l-;and ,adapted fo e i eicatcqnneetionwitnanz-ens nesoperated generator; 1- 1 This motor; is adapted; to operateat a speed in ratio proportionately greater thansany i v ;sn e or en ie-swea er;s ;an a cordingly -;t:he-armature-sand; fields thereof; are

preferably wound with wire of lower resistance m y; ew-sqns t nt wit h 7quired znumbena of windings within the physio mi'ts of the arrnaaid:motor being preferablygof the type lenowmtogthe -al'izas series- 'I-fl1-is motor qor equivalent -motive ipower,his essential to my inventionbecause by itsioperative 'rnpeller 1-2 the +goyernor mixingirvalve171315130111 I 5*:.t'he

I t o ztheapi tom iund r whichever ofj'rthe objects I and purnosesQffthisf inYentiom-is thereby a atiq Wi i n ezsp e L maware thtetheriermsin fm tive:pow r might-abe adapted; o ctuate tha-aforesaidele- 'ments, such power forrim 94 plied by gears and- =,s aft or-p lleys and belt-con- :as; could be s n nection with the engine, orbyjmeansof; arr-exhaust driven ,turbine but myl motor has many specificadvantages over suchubther sources of power, suchas (a) ease ofcontrbltojcut'iout'l motor,

Other advantages obviously irrherent in' this parts to -wear and "becomemaladj-usted; (0) a miniii u'm' er noise" and vibir'ation, (d)simplicity and econdr'nyof installation.

Reference numeral 33 designates ai-plug's'crewed or otherwise properlypassed through the fuel 'bowl cover I3 and extending below the liquidlevel in fuel bowl I6, this plug containing idler air duct 83, idlerfuel duct 81, accelerator air adjustment screw 33, accelerator air duct32, and accelerator fuel duct 3|.

Suitably connected to the plu 33 is idler mixture tube 34 whichdischarges into mixing chamber I6 through the duct 88 just above top ofmixing valve piston l5 at idling position illustrated in Fig. 5.

Accelerator riser 36, suitably connected with the plug 33, formsoperatively an integral part of accelerator cylinder 35 which isprovided at its open end with the restriction or Venturi tube 34 intowhich opens mixture duct 93, Adapted to move in cylinder 35, against thetension of coil spring 39, is piston valve 38 having a central bore 95communicating with side ports 35 opening into cylinder 35. For therecoil of the valve 38 I preferably employ the coil spring 31. Theclosed end of piston valve 38 is preferably fitted with a washer of somesuitable material, as illustrated in Fig. 3, or otherwise mechanicallyadapted to form an air-tight joint when on its seat at inner end of theplug 31. Suitably connected to the plug 31 at its discharge end is theaccelerator mixture tube 83 which discharges into mixing chamber I5preferably through the duct 98, or which may be adapted and connected soas to discharge into housing II, or through individual connections ateach arm of intake manifold of engine to which this carburetor may beattached.

It is obvious that it would be within the spirit and scope of myinvention to reverse the relative positions of the series of jets 53 andthe slide bar outlets 48.

To attain, among others, the objects hereinabove specifically outlined,my invention operates as follows:

Object .Upon starting of the engine to which this carburetor may beattached, idler assembly 34 draws fuel from chamber I6 through fuel duct81 and air through air duct 86, the mixture then being drawn through thetube 34 and discharged into mixing chamber I6 through the duct 88 justabove mixing valve piston I5 in the idling position illustrated in Fig.5.

The main air supply enters choke tube I past the choke valve 43 and thenthrough end ports 43, side ports 44 and central bore 45 of the airpiston 4, and thence into the horizontal air cylinder 2, dividing beyondthe cylinder outlet 4| into primary and auxiliary air supply. Theprimary air supply, upon opening of throttle valve 22, passes throughprimary air ports I4 and distribution air ports I5 and thence is drawnpast the jet discharge openings 48 of the slide bar I, the mixturecontinuing upward through venturi 2|.

As the engine speed increases beyond idling due to the opening ofthrottle valve, the rotation of armature of motor I through itsoperative connections causes the mixing valve piston I to lift off itsseat I0, thereby allowing auxiliary air present in port 63 to enterpiston seat ports 1|, this auxiliary air then passin between centralbore of piston l5 and its seat 73 and mingling with the'primary fuelmixture emerging from top of piston seat ID, the total fuel mixture thenpassing through side ports 33 and end ports 31 of piston I5 into mixingchamber l5 whence it is drawn upward by the suction of impeller I2 andthrough the impeller mixing chamber 58, thence passing throughconnections 53 to intake manifold of engine.

Pressure of the incoming air against and rush ing through air piston 4causes this piston to move forward against the tension of spring 5, thismovement being imparted to slide bar I by means such as the wristpin 45and the universal joint 6. Such movement of slide bar uncoversprogressively the discharge openings of jets 50 to the end that at anyposition of the slide bar the full discharge area of one jet or itsequivalent in the partially exposed discharge areas of several jetsshall deliver fuel into the air supply admitted by the throttle openingcorresponding to such position of the slide bar.

Object B.Exhaust gases from the engine in passing through hot spotchamber 8I impinge upon and heat central wall 83 of the body 33 whichcontains the main fuel duct 'II. As this main fuel duct is narrowed toaslit at fuel bowl IE, only the fuel contained in said duct and inthe'jet feeder ducts 18 is heated, the fuel in bowl I6 being insulatedfrom the remainder of the body 33 by the blind ports 82 which arepreferably open to the atmosphere on the under side of the body 30. Theheat thus acquired by the downward projecting riflles of chamber 8| istransmitted upward to the corresponding riflles rising from floor ofprimary air ports I4, which heat is picked up by the primary air supplypassing through ports I4. .The heat thus imparted to both the fuel andthe primary air supply has the known effect of greatly facilitating thevolatilization of the fuel to the end of a homogeneous and combustiblefuel charge to the engine.

Object C.The weight of the fuel charge to the engine supplied by thiscarburetor is increased as compared with that supplied by carburetors ofconventional design which heat all of the air supply or all of theair-fuel mixture because of two factors inherent in my said invention,i. e., (a) only the primary air supply is heated, the auxiliary airsupply being at atmospheric temperature, (b) the total air-fuel mixtureis compacted by the action of impeller I2.

Object DP-When for any reason during the operation of engine employingthis carburetor the throttle is suddenly closed but with clutch engaged,the primary air-fuel mixture is cut off from mixing chamber I6, but theattained momentum of vehicle incorporating said engine then drives theengine, and therefore through its electrical connection with enginegenerator the motor I0 continues to actuate the governor assembly l3,thus holding the mixing valve piston I5 off its seat and enablingauxiliary air at atmospheric temperature to continue passing through themixing chamber IE on its way to the heated cylinders of the engine,thereby cooling said engine and incidentally assisting in the enginebraking effect upon said momentum.

Object .As is Well known to the art of carburetion, when the throttle issuddenly opened wider for purposes of acceleration an extra supply offuel is momentarily required to offset the sluggish response of fuel inthe jets because of the greatly lessened suction efiect from thattheretofore existing around the jets. This condition is taken care of bymy accelerator assembly 35. Under normal engine operation, andespecially during idling, the partial vacuum existing in mixing chamberI6 holds to its seat on plug 31 the accelerator piston valve 38 againstthe tension of spring 33. Upon sudden opening of throttle valve, suctionceases upon seat end of piston valve 38, spring 39 pushes piston valve38 off its seat, and air entersaccelerator Venturi tube means adapted tofunction in response to and in ratio with engine speed forsimultaneously actuating means adapted for metering and controllingadmission of the auxiliary air supply and for compacting the totalair-fuel charge, this last-named admission-control means operating aswell to simultaneously cool and assist in a braking effect upon theengine in response to attained momentum under closed'throttle valve.

5. In combination, in a carburetor, means for admitting and meteringauxiliary air or other gas and total air-fuel mixture supply to a mixingchamber discharging into and adapted for connection with an engineintake manifold and operatively connected with a central body providedwith air and fuel supply means, said first-named means being embodied ina perforated piston valve adapted to move axially in said chamber tocontrol discharge from peripheral ports in a valve seat at intake end ofchamber, said seat being provided with a throttle-controlled centralbore adapted to regulate admission of primary air-fuel mixture supply.

6. In a combination, means adapted for guiding longitudinal movement andpreventing lateral and transverse variation from operative contactposition of a slidable member and compensating automatically for wear ofthe several slidecontact surfaces involved, said means being preferablyembodied in a casing generally guiding the movement of said member andhaving on one side manually adjustable guides, a self-adjustingguide-cover extending over and down both sides of casing and adapted byits outer configuration and by flexible means confined between itselfand outside of casing on one side to hold said slidable memberoperatively against fixed guide on one side of casing and main slidingsurface of casing.

7. In combination, in a fuel-metering mechanism, a slide bar adapted byits vertical perforations for selectively controlling the outlets of aseries of vertical fuel ducts in the horizontal slide-contact surface ofa casing having on one side a fixed guide and on the other sidetransversel adjustable guides for generally confining said slide bar,and means adapted for aiding said guides in preventing lateral andtransverse movement of said bar and for automatically compensating forwear of the several slide-contact surfaces involved in operativemovement of bar, said last-named means comprising a guide-coverextending over and down both sides of casing and adapted by itsconfiguration and by flexible means confined between itself and easingon one outer side to hold said bar in operative contact position againstmain sliding surface of casing and its fixed guide.

8. In a fuel-metering mechanism for a carburetor, in combination, meansadapted for controlling the outlets of a series of vertical fuel ductsof varying discharge area, said means comprising a vertically perforatedbar slidable along and guided by a casing containing said ducts andhaving on one side a substantially vertical fixed guide and on the otherside transversely adjustable guides, and automatic means adapted foraiding said guides in preventing lateral and transverse movement of saidbar and for compensating for wear of the several slide-contact surfacesinvolved in operative longitudinal movement of bar.

9. In a carburetor for an internal combustion engine, fuel-meteringmeans comprising, in combination, a vertically perforated bar preferablyof trapezoid cross-section slidable in a casing to control the outletsof a plurality of series of vertical fuel ducts of varying dischargearea in horizontal slide-contact face of casing, the casing having onone side a substantially vertical fixed guide and on the other sidemanually adjustable guides for generally confining said bar, aguide-cover bearing against one slide edge of bar and a portion ofduct-discharge surface of casing and extending over the top of said barand down both sides of casing, said guide-cover being provided with anundercut projection which engages a projection or groove on theadjustable-guide-side of casing and having a longitudinal groove on itsdownwardly projecting lip on fixed-guide-side of casing, said last-namedside of casing being provided with an opposing similar longitudinalgroove, and flexible means confined between said longitudinal groovesand adapted to hold said guide-cover in its operative lateral anddownward thrust against said bar and easing, said guide-cover being openfor the width and length of said series of fuel ducts to permit verticalfuel discharge.

10. In a combination, automatic means for actuating and controllingmovement of an operatively connected slidable element guided generallyin longitudinal movement by a casing, said actuating means being adaptedfor proportionate axial movement in a chamber by utilizing the varyinglyinduced pressure and energy of air or other gas flowing through saidmeans and chamher, said controlling means being adapted to coact withsaid casing to prevent lateral and transverse movement of said slidableelement.

11. In combination, in a carburetor for an internal combustion engine,automatic actuating means operatively connected with fuel-meteringmeans, the first-named means utilizing the pressure and energy ofengine-suction-induced air or other gas flowing through a perforatedpiston adapted to move axially in a cylinder in response to and in ratiowith said energy, the secondnamed means comprising a perforated slidablemember controlling the outlets of fuel ducts, means for guiding saidslidable member, the said guiding means comprising a casing providedwith said ducts and having manually adjustable casing guides, aguide-cover adapted to hold said slidable member against guide on oneside of casing and main sliding surface of casing, said guide coverbeing slotted over said slidable member to allow of fuel dischargethrough perforations in said member.

12. In a carburetor for an internal combustion engine, the combinationof automatic actuating means operatively connected with fuel-meteringmeans, the first-named means being adapted for utilizing the varyingpressure and energy of engine-suction-induced air or other gas admittedtherethrough to move in a chamber in ratio with said energy, the saidfuel-metering means being embodied in a perforated slidable memberadapted for controlling the outlets of fuel ducts selectively ofdischarge area generally in inverse ratio with said energy and guided inlongitudinal movement by elements adapted to keep it in operativecontact with discharge outlets of said ducts.

13. In a carburetor for an internal combustion engine, the combinationof automatic actuating means operatively connected with fuel-meteringmeans, the first-named means comprising a pis ton adapted to moveaxially in a cylinder in response to engine-suction-induced air-flowthrough its perforations and said cylinder, the second-named means beingembodied in a perforated slide bar operatively connected to saidactuating means andadapted' to -be guided-bye casing and a guide-cover;theguidemovenbeing adapted to holdsaidban-in operative contact againstfixed guide and main sliding-surface ofcasing and slotted :ontopto'permit-of fuel dis charge through said bar, the casingbeing-provided-with a plurality of series of fuel ductsof varyingdischarg areas adapted for control--selectively by' movement of said*bar.

'14; In a carbu'retorfor an'internal" combustion engine, the combinationof automatic actuating means with fuel-metering meansythefirst-namedmeans being embodiedin a spring-loaded airflow-responsive" perforated.piston adapted to move axiallyin a cylinderin ratio with thevelocity ofengine suction' induced air-flow through its perforations and saidcylinder, the secondnamed means being embodied -in-a-jetslide baroperatively connected to said piston and guided generally inhorizontalmovement byacasingprovided with a pluraiity-of- "seriesofvertical ful ducts ofvarying"dischargearea'adapted for'vertical"alinement with jjEtSiiiT bar 'and" controlled selectively according tomovementgo'ft bar, "and" a guide-:cover a'daptedto'jpermit' of fueldischarge from said jets and'to automatically"keepin-operativeijuxtaposition th eslidingjsurfac'esinvolved in such movementof slide -bar.

'15. In a carburetorfor an internal combustion engine, in combination, acentral body having' a fuel bowl therein, fuel. and primary air heatingmeans comprising ,a'hot-spot chamber'inthe hody adaptediforconventionalconnections respectively with a source .oiiheat anddischarge means, a central wan inthe body posi ioned in h p chamber,and'fhav'ing a main fuel duct communicatingfbetween the bowl and aplurality of vertically extendingljet feeder ducts, primary air supplyports in the 'body adjacent to hot-spot chamber, means (for admittingand controlling totalandlauxiliary andprimary air supply, and means fordirecting saidprimary-air supply past the outlets .offlsaid vducts,,v.and means for measuri'ng andlcontrolling discharge of fuel andauxiliary airlsup'pl y containedin enclosingmeansopr eratively connectedwithsaidicentral body and adapted: for connection with. intake manifold,of engine.

16; In a carburetor, in combination, air and fuel'suppl'y means,automatic meansjior controlling discharge .of said fuel, means forheating. the fuel and the primary air supply, throttle-controlledprimary air-tuel-mixture-supply means, andlautomaticallycontrolled..auxil-iaryeair-supply means andtotal-air-fuel-mixture-supply mean-s.

17. Ina. carburetor, in combination, a central body having a fuelsuppiyand aplurality-of seriesiof fuel feeder ducts communicating with saidfuel'supply, means for heating the fuel in said ducts and the primaryair supply, meansfor selectiyelycontrolling. theiou'tlets of said, ductsaid control meansbeing mountedon said body and comprising a casing, aguide-cover, and. aper-v forated bar, saidibar' being slidable. inandnartiall'y guided by the casing which has on one side a fixed guide andon, the other sidetransversely adjustable. guides for generallyconfiningthe bar, theguidecover being adapted topermit discharge of fuelfrom perforations of bar and to hold said ,bar-inplacecloselyagainstmain sliding surfaces of casing, said casing being provided witha plurality of series of perforations vin vertical juxtaposition withsaidfuel feeder .ducts, an air-admitting cylinder containing meansresponsive to suction of engine employing carburetor for automaticallyactuating through operative connection said 'fue1-control*means, 'and;

amixingchamber operatively connecting said central'body and cylinder andadapted'foruconnectionwith intake manifold of engine, said chambercontaining throttle-controlled primary air-fuel-mixture-supply means andpower-actuated means for admitting and'metering auxiliary air supplyand' total fuel-mixture supply to mix ing chamber.

18, In a carburetor for an internal combustion engine, in combination, abody having an air passage'therein, a-fuel supply bowl in the body,vertically extending jet ducts of varying discharge area communicatingbetween the bowl and theair passage, a slide bar operatively connectedwith engine-suction-induced air-flow-responsive actuatingmeans-andadapted for controlling the outlets-of said ducts by progressiveselection of'fueldischarge areain ratio generally inverse with airflowspeed, and means for directing air-past thetacjhedto seat end of saidchamber, said chamberat its discharge end being adapted for connectionwith intake manifold of engine, and meansoheratively connected with saidchamber and body adapted for admitting and controlling total air supplyand for controlling selectively, in response to speed ofengine-suction-induced air-flow therethrough, the fuel discharge area inratio generally inverse with said speed.

'20. In a carburetor for an internal combustion engine, in combination,throttle-controlled means for metering primary air-fuel-mixture supplyand automatic means for metering and controlling admission of auxiliaryair and total-air-fuelmixture supply contained in a mixing chamberhaving its discharge end operatively fastened to a housing adapted forconnections with intake manifold of'engine and its intake end adaptedfor fastening to a central body provided with air and fuel su plycontrol means, the said automatic air-and-mixture control means beingembodied in a perforated piston valve normally closing auxiliary airports in the periphery of a piston valve seat in intake end of chamberand adapted to control discharge from said ports and to move axiallysaid chamber by operative connection with a centrifugal governor on ashaft passing through said housing and adapted for power drive,

'21. Ina carburetor for an internal combustion engine in combination, amixing chamber having its, discharge end adapted for connections withintake manifold of engine and provided with means for metering primaryair-fuel-mixture supply and. power-actuated means adapted to control andmeter auxiliary air and total-airfuel-m'ixture supply, the intake end ofsaid chamher being adapted for fastening to a central body having an airpassage therein, a fuel bowl in the body and 'jet ducts of varyingdischarge areaconnecting the bowl with the air passagaaslide barcontrolling the outlets of the ducts, automatic means controlling themovement of the slide bar, and means for directing air past the outletsof the ducts.

22. A carburetor for an internal combustion engine, comprising, incombination, air supply means, fuel supply means, automaticengine-suction-induced air-fioW-responsive means adapted to move axiallyin a cylinder for actuating through operative connection a fuel-meteringmechanism in operative connection with a central body provided with afuel bowl connected with jet ducts of varying discharge area and meansfor admitting primary air supply past the outlets of said ducts, aperforated slide bar controlling the discharge fromthe ducts, andoperatively attached to said body at its discharge face being a mixingchamber provided at such attached end with an auxiliary air entry portcommunicating with said cylinder and with a valve seat having aplurality of peripheral auxiliary air discharge ports controlled by aspring-loaded piston valve adapted to move axially in said chamber bymeans of operative attachment to a shaft adapted for power-actuation,said seat having a central bore adapted for throttle-valve control, thedischarge end of said chamber being adapted for connection with intakemanifold of engine.

23. A carburetor for an internal combustion engine including, incombination, total-air-supply-control means contained in a choke tubeoperatively attached to intake end of a total-airadmission cylindercontaining an air-flow-responsive piston adapted by its perforations andotherwise to move axially in said cylinder in ratio progressively withair-flow speed therethrough, a central body operatively attached todischarge end of said cylinder and formed with ports adapted to permitflow of primary air supply past the outlets of its contained fuel feederducts of vary ing diameter communicating with the source of fuel supply,means operatively connected with said piston for controlling the outletsof the ducts, said duct-control means being guided in longitudinalmovement by a casing provided with perforations in verticaljuxtaposition with said ducts and flexibly held in operative contactposition in casing by a self-adjusting guide-cover, the said guidingmeans being mounted on the said central body. and operatively fastenedto discharge face of said body being a mixing chamber containingthrottle-controlled primary-air-fuelmixture-supply means andpower-actuated means for admitting and metering auxiliary air supply andttal-air-fuel-mixture supply to said chamber, discharge end of saidchamber being adapted for connection with intake manifold of engine.

24. A carburetor for an internal combustion engine comprising, incombination, total-airsupply-control means attached to intake end of anair admission cylinder containing an enginesuction-inducedair-flow-responsive perforated piston adapted to move axially therein, afuel bowl and primary-air-supply ports formed in a central bodyoperatively attached to discharge end of said cylinder, fuel ductsconnecting said fuel bowl, with the primary air ports, means operativelyconnected with said piston for selectively controlling the outlets ofthe ducts, and operatively attached to top flange of central body beingintake end of a mixing chamber having its discharge end adapted forconnection with intake manifold of engine, said intake end of chamber 14being provided with an auxiliary air entry port communicating betweensaid cylinder and a plurality of discharge ports in the periphery of a.valve seat having a valvecontrolled central bore adapted to regulateadmission of primary-airfuel-mixture supply, a piston valve adapted tomove axially in said chamber to control said valve seat ports, and meansoperatively connecting fuel bowl with mixing chamber and adapted forinducing an idling fuel mixture supply in response to engine suctiondepending upon carburetor throttle position.

25. A carburetor for an internal combustion engine comprising, incombination, conventional air-intake-control means contained in intakeend of a total air-admission cylinder having axially movable thereinengine-suction-induced air-fiowresponsive means adapted to actuate anoperatively-connected fuel-discharge-control mechanism in operativeconnection with and mounted on a central body having an air passage anda fuel supply bowl in the body and fuel ducts of varying discharge area.communicating with fuel bowl and air passage and said fuel-dischargecontrol mechanism, means for directing the primary air supply past theoutlets of the ducts, a mixing chamber operatively attached to centralbody and discharge end of cylinder and having auxiliary air supplymeans, throttle-controlled primary-air-fuel-mixture-supply means andpower-actuated means adapted to control admission of auxiliary air andtotal-air-fuel-mixture supply, and engine-suction-responsive means op-'eratively connecting fuel bowl with mixing chamber and adapted fordischarging therein an idling fuel mixture supply depending uponcarburetor throttle position, discharge end of mixing chamber beingadapted for connections with intake manifold of engine.

26. A carburetor for an internal combustion engine comprising, incombination, fuel supply means, air supply-control means contained inintake end of a total air-admission cylinder having axially movabletherein engine-suction-incluced air-flow-responsive means adapted foractuating and controlling through operative connection the movement offuel-metering control means operatively mounted on a central body havingan air passage for primary air supply and a fuel bowl in the body andfuel ducts of varying discharge area connecting the bowl with said airpassage, means for directing air past the outlets of the ducts, saidcentral body being operatively attached to a mixing chamber providedwith throttle-controlled primary air-fuel-mixturesupply means andautomatic means responsive to engine speed adapted for controlling andmetering auxiliary air supply and total air-fuel-mixture supply whenengine is under load and for admitting only an air supply when acquiredmomentum of vehicle employing said engine is driving the engine withthrottle closed, idlingfuel-mixture-supply means operatively connectingfuel bowl with mixing chamber and responsive to engine-suction dependingupon carburetor throttle position, the discharge end of said mixingchamber being operatively connected with an impeller housing adapted forconnections to intake manifold of engine and containing totalair-fuelmixing and compacting means embodied in an impeller adapted forpower-actuation and to revolve therein at speeds in multiple ratio withengine speeds, a centrifugal governor operatively connected with saidauxiliary-airsimply? I and -t taleair-fuel-mixt regs nplydr 4 mis ion; on-clinici n 27;, A carburetor for; an internal combustion engine;comprising; in=- combinatiom fuel supply meansa air-'su plyecontrolmeans contained in air: supply;ia mixing-"chamber? operativelyat tachedto: discharge- 'face *ofcentral "body and having aux-iliary-air-supplymeans communicating with theoperatively attached discharge endof-cyl-inderand meansadap'tedto meterand admit to'm'ixi-n'g chamber-theprimary air-fuel mixture supply; discharge l'end i of *said mixing.chamberbeing provided with operatively connected poweractuated-meansadaptedformetering and 'con-.

trolling iadmis'sionof-rauxiliary 'air l and total air fuel mixt'urecharge; when engine. is under load and'for'? admitting onlyisan air'supply when acquirecb momentum' 'of vehiele' employing "theintake-end-andhaving at said end an-i-auxiliary air entry portcommunicating 'with saidcylinder and with a pluralityof dischargeportsin,-,.the; periphery of a piston valve seat having,a,-cen-1tralzborecontrolled bya throttle valve adapted for manual control overthe admission .ofprimary-vair-fuel-mixture supply, the said ports;beingadapted -forcontrol by a normally-closed; perforatedpiston valveaxially movable inssaid- :chamberby means of operative connectionlwitha. centrifugal governor, the discharge end of mixing: chamber beingoperatively fastened to, an impeller housing adapted for connectionswith intake manifold of engine anclcontainingmeans-= ;adapted forfinally mixing and compacting-thetotal-air-fuel charge to the intakemanifold, said means being embodied in a conventional impeller adaptedto revolve in impeller housing by reason of operative connection with ashat-t tenant engine-generator-speed-responsive motor, adapted tofunctionat a speed in multiplesratios,

with any given engine speed, and also operatively connected to saidshaft and within the mixing! chamber being the said centrifugalgovernor,

. meansladapted to supply an idling fuel-mixture "supply-responsive toengine suction depending engine is driving :said engine .with throttlevalve closed; an impeller h'ousin'g operativeliylattached to dischargeen'd ofimixing chamber and adapted for monnections with intakei'manifold" of engine and containing total'-*air'=fuel-"mixing and fuelcharge compacting means embodied in i an imr-j PBHIGI'fii-diiiDliBdlJO'revolvein thehousing at a speed ins-multiple ratioiwith an given engineispeed by reason of its" operativeaconnection"witlisaid power=actuatedmeans,- :id1ing air fuelemixturesupply'wmeans 'operati-vely: conn'ectingfuer bowl with --mix-ing chamber and *responsive I to? engine atmospheredepending: upon sudden-"throttle openingn 281 A: carburetor for aninternal combustion enginecomprising, in: combination," total-air:supply controlmeans :-conta=ined-in a; choke tube' operativelyr-attachedto intake endof an air admission ratedpiston operatively'conneetingwith a per= f orated 7138,15 slidable in and 'guided by' acasinganda g self -adjustingguide-cover embodying a fuel-metering,-mechanism mounted on a central bodyhaving afuel' bowl therein, amain-fuel duct. communicating; betweenethebowl'-and -apluralityfof,vertically ext-ending jet feeder ducts of. varyingdischarge areain vertical juxtaposicylinder containingan: air-flow-=responsive spring-loaded" axially-movable perfo upon carburetor'throttleposition, said means beingembodied in a duct-perforated fuel and airplug operatively connected with said fuel-bowl and" mixing 'chamber, andsudden-throttleopening responsive acceleration fuel-metering, supplymeans embodied in a perforated pistoni valve normally closing againstspring tension the'discharge end of a cylinder operatively connectedwith mixing chamber and the atmosphere, said valve being adapted to moveaxially in said cylinder.

29; In combination with an internal combus tion-engine carburetorequipped with an impeller in operative combination with the other meansas-and for the purposes illustrated and described in this specificationincluding air and fuel supply means, engine-suction-inducedair-flow-respon-' sive fuel-discharge-control means, meansforconductingprimary air supply past the fuel-= ply andior improvinghomogeneity of and com-- pasting total-air-fuel-mixture-charge to theintake manifold, electrically operated meansadapted for connection withelectrical system of engine and operatively attached to and adapted foractuating the said fuel-mixture- 'compacting means at a speed in ratiowith and tion with,fuelflperforations 2 provided in casing,-

the said bar, being adapted-to control seiec-tively' the ,birtl'etsof.,said ,perfonationaprimar-y ain entry ports connecting 1 dischargeend (of cylinder with distribution air ports, adapted 1 to pass primaryair, around fuel .jetf. outlets-, means adapted-for greater than anygiven engine speed.

30. In combination with a cylinder having auniform major bore portionforming shouldersrespectively with a minor bore inlet portion and aminor bore outlet portion, the inner ends of said bore-portions bein inopen communication, aperforated member slidable in said major boreportion against resilient means normally urging-said member toward saidinlet end shoulder;

the perforations of said slidable member being improving.air-fuel-mixture. combustibility -embodiedin a. hot spotchambenin thebody formed with conventional corrugations orvriflles-in opencommunication a between, exhaust manifoldand adapted to provide means ofcommunication between said minor bore portions and topass therethroughat all times and at any position of'said member a pressure-induced floworgassubstantially satisfying the volumetric capacity exhaust pipe.vofengine, conventionalmeans of. said minor bore outlet portion and tomove axially insaid major bore portion in-response to and in ratio withspeed of such flow.

31. In a carburetor for an internalv combustion.

engine, in combination, a cylinder having a uniform major bore portionforming shoulders with a. minor bore inlet portion and a minor boreoutlet portion, a fuel-discharge-control means operatively connectedwith automatic actuatin means, the last said means comprising aperforated member in said major portion and adapted to pass throughitself at all times and at any position in said cylinder apressureinduced flow of air or other gas substantially satisfying thevolumetric capacity of said minor bore outlet portion and to moveaxially in said major bore portion in response to and in ratio withspeed of such flow.

32. In a carburetor for an internal combustion of such flow.

OLAF OSWALD.

